.course-preview {
  .unnarrow {
    position: fixed;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #464646;
    color: white;
    width: 70px;
    height: 70px;
    z-index: 999;
    border: 1px #2c2c2c solid;
    border-radius: 5px;
    bottom: 120px;
    right: 50px;
    cursor: pointer;
  }
  .edit-Btn {
    position: fixed;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #464646;
    color: white;
    width: 70px;
    height: 70px;
    z-index: 999;
    border: 1px #2c2c2c solid;
    border-radius: 5px;
    bottom: 30px;
    right: 50px;
    cursor: pointer;
  }
  .edit-box {
    position: fixed;
    width: 350px;
    bottom: -400px;
    right: 10px;
    background: #fff;
    padding: 15px 15px 55px 15px;
    box-sizing: border-box;
    border-radius: 3px;
    font-size: 14px;
    box-shadow: -8px -9px 12px #aaa;
    z-index: 9999;
    transition: all 0.5s ease;
    .edit-title {
      margin: 20px 0;
      display: flex;
      justify-content: space-between;
    }
  }
  .leftContainer {
    flex: 1;
    .video-unfull {
      position: absolute;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      padding: 40px 6px;
      background-color: #444;
      color: #a8a8a8;
      font-weight: bolder;
      cursor: pointer;
      z-index: 9999;
      &:hover {
        background-color: #636363;
      }
    }
  }
  .title {
    height: 60px;
    line-height: 60px;
    padding: 0px 25px;
    background-color: #555555;
    color: white;
  }
  .video-box {
    position: relative;
    width: 100%;
    height: 100%;
    .left-top {
      left: 0;
      top: 0;
    }
    .right-top {
      right: 0;
      top: 0;
    }
    .right-bottom {
      right: 0;
      bottom: 140px;
    }
    .left-bottom {
      left: 0;
      bottom: 140px;
    }
    .pdf-box {
      position: absolute;
      width: 520px;
      z-index: 1;
      .title-tools {
        display: flex;
        align-items: center;
        padding: 0 15px;
        color: #e9e9e9;
        height: 60px;
        line-height: 60px;
        background-color: #464646;
        .pdf-pagenum {
          height: 24px;
          margin: 0 5px;
          width: 60px;
          text-align: center;
          border-radius: 2px;
          background-color: hsla(0, 0%, 100%, 0.09);
          border: 1px solid hsla(0, 0%, 0%, 0.35);
          border-color: hsla(0, 0%, 0%, 0.32) hsla(0, 0%, 0%, 0.38) hsla(0, 0%, 0%, 0.42);
          color: hsl(0, 0%, 95%);
          font-size: 12px;
          outline-style: none;
        }
      }
      .pdf-content {
        height: 300px;
        overflow: auto;
      }
      .foot-tools {
        display: flex;
        height: 60px;
        line-height: 60px;
        color: #161212;
        font-size: 18px;
        background-color: #464646;
        div {
          display: flex;
          align-items: center;
          cursor: pointer;
        }
        img {
          margin: 0 5px 0 15px;
          width: 35px;
          height: 35px;
        }
      }
    }
  }
  .pdf-box {
    width: 100%;
    z-index: 1;
    .title-tools {
      display: flex;
      align-items: center;
      padding: 0 15px;
      color: #e9e9e9;
      height: 60px;
      line-height: 60px;
      background-color: #464646;
      .pdf-pagenum {
        height: 24px;
        margin: 0 5px;
        width: 60px;
        text-align: center;
        border-radius: 2px;
        background-color: hsla(0, 0%, 100%, 0.09);
        border: 1px solid hsla(0, 0%, 0%, 0.35);
        border-color: hsla(0, 0%, 0%, 0.32) hsla(0, 0%, 0%, 0.38) hsla(0, 0%, 0%, 0.42);
        color: hsl(0, 0%, 95%);
        font-size: 12px;
        outline-style: none;
      }
    }
    .pdf-content {
      overflow: auto;
    }
    .foot-tools {
      height: 60px;
      background-color: #464646;
    }
  }

  .status-desc {
    display: flex;
    justify-content: space-around;
    height: 60px;
    background-color: #555555;
    color: #ccc;
    align-items: center;
    border-bottom: 1px solid #666;
    width: 400px;
    .item {
      display: flex;
      align-items: center;

      .circle {
        display: inline-block;
        margin-right: 10px;
        width: 20px;
        height: 20px;
        border-radius: 50%;
      }
      .circle-unfinish {
        background-color: #ffbb66;
      }
      .circle-progress {
        background-color: #3399ff;
      }
    }
  }
  .circle {
    display: inline-block;
    margin-right: 10px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
  }
  .circle-unfinish {
    background-color: #ffbb66;
  }
  .circle-progress {
    background-color: #3399ff;
  }
  .course-list {
    position: relative;
    width: 100%;
    overflow-y: auto;
    font-size: 16px;
    background-color: #555555;
    .course-list-title {
      margin-top: 10px;
      color: #9c9c9c;
      padding: 0 15px;
      line-height: 40px;
    }
    .cours-section {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
      padding: 10px 20px;
      color: white;
      .progress-box {
        width: 80px;
      }
      &:hover {
        cursor: pointer;
        background-color: #444444;
      }
    }
    .video-full {
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      padding: 40px 6px;
      background-color: #444;
      color: #a8a8a8;
      font-weight: bolder;
      cursor: pointer;
      z-index: 9999;
      &:hover {
        background-color: #636363;
      }
    }
  }
  .control-group {
    padding: 15px 0;
    width: 100%;
    .content {
      position: relative;
      display: flex;
      justify-content: space-between;
      width: 1390px;
      margin: 0 auto;
      font-size: 1.2em;
      .content-icon {
        color: #39f;
        cursor: pointer;
        padding-right: 10px;
        font-size: 1.5em;
      }
    }
  }
  .course-content {
    padding: 30px;
    background-color: #f4f4f4;
    .content {
      display: flex;
      width: 1390px;
      margin: 0 auto;
      .left {
        flex: 1;
        .content-title {
          display: flex;
          align-items: center;
          justify-content: space-between;
          font-size: 1.2em;
          margin-bottom: 20px;
        }
        .question-content {
          position: relative;
          padding: 20px;
          border: 1px #ddd solid;
          background: #f4f4f4;
          margin-bottom: 20px;
          .send-btn {
            position: absolute;
            left: 10px;
            bottom: 10px;
          }
        }
        .question-list {
          border: 1px solid #ddd;
          background-color: #fff;
          border-radius: 3px;
          padding: 20px 15px;
          .question {
            display: flex;
            justify-content: space-between;
            margin-bottom: 30px;
            .username {
              color: #3399ff;
              padding-right: 15px;
            }
            .answer-btn {
              color: #3399ff;
              align-self: flex-end;
              cursor: pointer;
            }
          }
          .answer-list {
            position: relative;
            margin: 10px 0 20px 0;
            padding: 20px;
            border: 1px #ddd solid;
            background: #f4f4f4;
            .answer-title {
              display: flex;
              justify-content: space-between;
              align-items: center;
              margin-bottom: 10px;
            }
            .satif-answer {
              margin-bottom: 15px;
              padding: 20px 20px 40px 20px;
              border: 1px #efcaa7 solid;
              border-top: 5px #d66c04 solid;
              background-color: #fffbe8;
              img {
                width: 25px;
                height: 25px;
              }
              .satif-text {
                color: #d66c04;
                padding-left: 5px;
                font-size: 18px;
              }
              .answer-controls {
                color: #3399ff;
                div {
                  cursor: pointer;
                }
              }
            }
            .other-answer {
              margin-bottom: 15px;
              padding: 15px 0;
              border-bottom: 1px #eee solid;
              .answer-controls {
                color: #3399ff;
                div {
                  cursor: pointer;
                }
              }
            }

            .username {
              padding: 0 10px;
            }
            .delete-btn {
              color: #3399ff;
              align-self: flex-end;
              cursor: pointer;
            }
            .send-btn {
              position: absolute;
              left: 10px;
              bottom: 10px;
            }
          }
        }
        .active {
          position: relative;
          color: #39f;
          &::before {
            content: '';
            display: block;
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: #39f;
            border-radius: 2px;
          }
        }
        .content-icon {
          cursor: pointer;
          font-size: 1.5em;
          padding-right: 5px;
        }
      }

      .right {
        width: 400px;
        margin-left: 30px;
        .right-title {
          padding-top: 15px;
          font-size: 1.5em;
        }
        .right-content {
          font-size: 1.1em;
          background-color: #fff;
          margin-top: 20px;
          border: 1px solid #ddd;
          padding: 0 20px;
        }
      }
    }
  }
  // 章节
  .bt-section {
    color: #666;
    cursor: pointer;
    border: 1px solid #eee;
    min-height: 43px;
    line-height: 43px;
    padding: 3px 15px 3px 15px;
    align-items: center;
    display: flex;
    justify-content: space-between;
    position: relative;
    &:hover{
      background-color: #e5f0f8;
    }
  }
  // 笔记
  .mynote-list {
    border: 1px solid #ddd;
    background-color: #fff;
    border-radius: 3px;
    padding: 15px;
    margin-top: 20px;
    .username {
      color: #3399ff;
      padding-right: 15px;
    }
    .mynote-btn {
      color: #3399ff;
      align-self: flex-end;
      cursor: pointer;
    }
  }
}
